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E. R.'S'HERIDAN Paper-Cutting Machine.-

No. 221,99 9,. Patnted May 25, 1880.

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UNITED STATES EDWIN R. SHERIDAN, OF BROOKLYN, NEW YORK.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 227,999, dated May 25, 1880.

Application filed March 2t, 1880. (No model.)

To. all whom it may concer'n:

Be it known that I, EDWIN R. SHERIDAN, of :Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Paper-Cutting Machines; and I do hereby declare that the following is a full andexact description thereof, reference being had to the accompanying drawings, making part of this specification.

Previous to my invention paper-cutting machines have been made in which the clampingbar, which is first forced down onto the paper to be cut, and which firmly holds the paper in place during the cutting operation, has served to. resist the force employed to move the cutting-knife, so that the pressure of the clamping-bar upon the paper would be increased in proportion to the force necessary to be applied to the knife or shearing blade; but in all machines with which I am familiar, involving this principle of operation, the mechanism constituting the means for effecting this sort of co-operative application of the power to the clamping-bar and knife has been comparatively complex and illy adapted to the transmission of the motive power applied to the machine with the least possible waste by friction, and with the least wear on and liability of derangement in the working parts of the mechanism.

An example of such prior machines in which, though the knife and clamp are operated upon the principle alluded to, the organism is such as to be objectionable for the reasons stated, may be seen in United States Letters Patent No. 223,744, of January 20, 1880.

Of course, no one familiar with the principles of mechanisms will confoundthe organism shown in said patent with what I am about to hereinndescribe as a novel organism for :an analogous purpose,lbecause, as will be presently seen, whatI am about to describe as my invention involves the employment of a duplex creepinglever acted upon directly by the driving mechanism and possessing the capacity to operate alternately, as of first one and then another order, while the prior organism referred to embraces an organism in which the movement of theclamping-bar is produced by means operating upon the principle of a lever having a stationary fulcrum, and the movement of the knife is produced by means operating on the principle of a creeping lever.

My invention has for its object to provide means for the alternate movements of the clamping-bar and knife in a co-operative manner, which, while they shall be capable of transmitting the motive power to the clamping-bar and knife with the greatest degree of economy, shall be exceedingly simple of construction and possess the requisite strength and durability.

To this end and object my invention consists in the combination, with the usual clamping-bar and knife-frame, of driving-racks connected, respectively, to the said clamping-bar and knife-frame, and a duplex creeping lever, whereby I am enabled, by the direct application of the motive power to one end of said duplex lever and a movement of it in one direction, to drive the said racks and the parts which they move in the proper manner, as will be hereinafter more fully explained.

To enable those skilled in the art to make and use my invention, I will proceed to more fully describe the construction and operation of my improved machine, referring by letters to the accompanying drawings, making part of this specification, and in which Figure l is a face view or front elevation of a machine embracing my invention. Fig. 2 is a similar partial elevation, but showing the moving parts in a different position. Fig. 3 is another similar view, with the parts in still another position, and Fig. 4: is a plan or top View.

In the several figures the same part will be found designated by the same letter of referonce.

A is the table; B, the main frame or supporting-stand; O, the vertically-reciprocating clamping-bar, that holds down the pile of paper to be cut; and D the knife frame or stock, carrying the shearing-blade d, and having the necessary downward-sweep motion, all constructed and arranged in about the usual manner, but operated or driven by the novel means 'which I will now more minutely describe. t

In a suitable stand. E, arranged at one side of the machine, and, in the case shown, about on a level with the table, is mounted in suitable bearings the main driving-shaft F, provided with a pulley, G, for the application (by a belt) of the motive power. On this main shaft are mounted, so as to turn freely but not move endwise, a pinion, I), and half'clutch c, and so as to move endwise on it, but not turn thereon, a half-clutch, d, the arrangement of these parts being such that a movement of the half-clutch (1 upon the said shaft F in one direction or the other will either cause any rotation of said shaft to be imparted to the said pinion b, or permit said shaft to revolve without turning said pinion.

In the same stand E is mounted the countershaft H, on which are made fast a spur-gear, I, and a drum or strap wheel, 6, the said gear I engaging with the pinion I), and the said wheel or drum 0 having made fast to its periphery one end of a cord or strap adapted to be wound upon said drum, and having its outer end fastened to the end of a lever designed to be lifted, for purposes to be presen tly. explained.

f is a shipper-bar, pivoted in a lug, g, proj ectin g horizontally from a portion of the stand E, and adapted, by a vibratory movement, to more the half-clutch d to throw the drivingshaft into or out of working engagement with the driving-gears. This shipper-bar is moved by hand in one direction to throw the drivinggears into a working condition, and is automatically moved in the other direction to throw the parts out of gear by a tripping-lever, h, pivoted to the main frame, as shown, and moved by a projecting lug or pin, 1', on one end of the knife-frame.

J is the main working-lever of the machine. It is weighted at its outer or free end, near which the strap or cord 70, by which said end is lifted, is applied, as clearly shown. This lever J has no fixed fulcrum, but is formed or provided near its inner end with a double sector, or suflicient portion of a spur-gear, L, with which engage two vertically-arranged racks, M and N, that, respectively, are secured to and move two reciprocatory frames, 0 and P, and the arrangement together of these parts is such that during the movements of lever J the points of engagement between the racks M and N and the portions of gear L that respectively engage with said racks become alternately the moving fulcra of said lever.

Q; is a bent lever pivoted near its angle by a pin, l, to the main frame, and having its lower end connected by a pin-and-slot connection to the lower middle part of frame 0, while its upper end is pivoted to one end of a connecting-rod, m, the other end of which rod is connected at n to the knife-frame.

In the operation of the machine, the power being applied by a proper movement of the shipper handle or bar f, the rotation of the strap wheel or drum winds up the cord or strap 70, and thereby the weighted end of lever J is lifted.

During the initial movement of said lever, and until such movement is arrested, its fulcrum is at the point of engagement between the gear L and the rack M, and is a moving fulcrum, the lever acting as a creeping lever and one of the first order, and operating to depress the rack N and its frame P.

When the said frame P shall have been moved down until the clamping-bar O, with which it is connected, shall have come to a bearing and pressure on the paper, the point of contact between the clamp and the paper then becomes the resistance, and sincethe rack N can move no farther, the point of engagement between said rack and the gear L becomes the fulcrum of the lever J, and, as in the first action, the said lever acts as a creeping lever, and in its further movement operates to lift the rack M and the frame 0, whereby the bent lever Q, is vibrated and the knifeframe is caused, through the medium of the connecting-rod an, to descend and cut the paper, the lever in this part of its movement hay ing, however, been transformed into one of the second order. By the time the cutting-edge of the knife shall have reached the proper point in its descent the pin 2' will have moved the trip-lever 71, and thrown the shipper-handle off to unclutch the driving-gear mechanism, thus automatically stopping the working movements of the knife and other parts, whereupon, by the gravity of the lower frame, 0, and the weighted end of lever J, all the parts are brought to the positions in which they remain during the disuse of the machine.

It will be seen that by the employment of the duplex creeping lever, as shown and described, operating through the medium of rack N directly on the clamping device to draw it down onto the paper, and then acting, as described, through the medium of the rack M and bent lever Q, to draw down the shearingknife, the motive power applied to the clamping and cut-tin g mechanisms not only induces the fore applied to these devices to act in the usual on .tions and manner, (alluded to in the early part of this specification,) but is most economically employed, and that the mechanism through themedium of which said power is transmitted from the main driving mechanism to the clamping and cutting devices is exceedingly simple, durable, and desir-able in its construction.

Of course, the forms and precise arrangements of parts shown may be varied without changing the nature of the machine or my invention.

I do not therefore wish to be understood as limiting my claim of invention to the particular form of the invention shown; but,

Having shown my invention carried out in a machine of the form illustrated, what Iclaim as new, and desire te secure by Letters Pat- In witness whereof I have hereunto set my ent, ishand and seal this 24th day of March, 1880.

The combination, Wlfll the cutting and EDWIN R SHERIDAN [L S clamping devices, of a duplex creeping lever 5 and racks connected, respectively, to the said In presence ofcutting and clamping devices, substantially as J A0013 FELBEL, described, for the purposes set forth. M. H. DILLENBEOK. 

